<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <title>An invalid document</title>
  </head>
  <body>
    <p>This XHTML document is <span class="#foo">invalid</span>.</p>
  </body>
</html>

<!-- arch-tag: 8127c8be-d617-46f5-bdf2-c9159a417c38
     (do not change this comment) -->
